Stave-cutting machine



v (No Model.)

G. A. ON GKEN.

STAVE CUTTING MACHINE.

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UNITED STATES PATE T O FICE.

GUSTAV A. ONOKEN, OF ACKSON, MICHIGAN.

STAVE-CUTTING IV IACHINE.

SPECIFICATION forming part of Letters Patent No. 423,626, dated March 18. 1890. Application filed December 6, 1889. Serial No. 332,757. (No model.) Patented in Germany March 9. 1889, No- 431 663- To all whom it may concern:

Be it known that I, GUsrAv A. ONoKEN, a citizen of the United States, residing atJackson, Michigan, have invented an Improvement in Stave-Cutting Machines, (for which I have obtained Letters Patent in 48,663, March 9, 1889,) of which the following is a specification.

In the accompanying drawings, forming part of the specification, the same letters of reference denote corresponding parts.

The invention relates to a machine by the aid of which barrels, casks, and the like coopers work can be made ofone board of wood, which is produced by peeling it from a log of wood rotating round its axis. The board, coming still wet from the peeling or rotating veneer-cutting machine, is of a width equal to the height of the barrel and of the required thickness. It iscut in lengths corresponding to the circumferenceof the barrel.

By the machine, forming the object of the present invention, wedge-shaped pieces are out out of the board alternately at the two length sides in such way that the bases of all these pieces coincide with the two length sides. The board is then bent to form a cylinder. The stave-like pieces of both ends of it are forced to inward and kept together by hoops, whereafter the barrel is finished.

In the drawings, Figure 1 is a front elevation of the machine, partly in section. Fig. 2 is a vertical cross-section. Fig. 3 shows the under die. Figs. 4: and 5 are a cross and a length section of one plunger with upper die attached. Figs. 6 and 7 show the shape of the out just when the board has been perforated and when it is straighten ed again. Fig. 8 represents a board after it has passed the machine.

The different parts of the machine are arranged between and supported by two frames A A. The shaft Ct, driven by means of the pulley a, transfers its rotation to the double crank-shaft (Z on top of the frames A A by means ofa chain running over the chain-wheel Z) upon the shaft to and the chain-wheel 0 upon the crank-shaft cl. The purchase of b and c is as 1 to 2. Vith the cranks f and g arranged opposite each other are connected by the links it c the plungers k and Z, guided by the pro j ections in Z of the box-shaped cross-beam m.

Germany, N0..

ings in the frames A A, and of which the top rollers r and s are adjustable. These said rollers serve to feed the board between the dies and to remove it out of the machine.

Two adjustable cheek -plates to and o keep the board close to the under die and to the convex die-holder t. the upper dies as 00 cut alternately, as the cranks f and g are on opposite sides of their shaft d. Therefore the incisions will alternate, as in Fig. 8, and the feeding of the board must take place when the cranks stand at about half-stroke, and the rollers r r and s s mustwork simultaneously only at this time. That is effected in the following manner: Upon the shafts of the rollers r and s are mounted two wheels q q gearing into the pinion 19 upon the countershaft 19. Upon this shaft 19 is mounted a grooved friction-pulley 0, which is moved for a short time at each revolution of the shaft ct by the corresponding frictionwheel to, which is mounted upon the shaft a. This latter wheel to is furnished with the fric tion-ridges 01, corresponding to the grooves of the pulley 0 only for a short distance of the periphery, so that it actuates the pulley 0 only when these ridges n come in contact with the pulley 0'. Therefore the diameter of the chainwheel 17 is to be about half as large as that of the chain-Wheel c and the purchase of the wheels 19 and q q is also as 1 to 2. In case the cuts in the board shall be wider or narrower from each other the purchase of the chainwheels is to be altered correspondingly.

The reason why the die-holder t is made convex and why the board to be cut is bent correspondingly during the cutting manipulation is to make the openings in the board when it is straightened, Figs. 6 and 7, wider on the under side than on the upper side, which latter forms afterward the outside of the barrel. By this means the sides of the cuts make tight joints when the board is bent together and the stave-like pieces of It is understood that the board are forced together to give to the barrel the proper bulged shape. For different shapes and sizes of barrels corresponding dies must be used and the rollers r s and cheek-plates u *0 accordingly adjusted.

After having described my invention, and

' the manner in which the machine Works, I

die-holder t, substantially as shown and described, and for the purpose set forth.

3. In a machine for cutting wedge-shaped pieces out of boards, the plungers 7t and Z, connected to a double crank-shaft d, the cranks f and g of which are oppositely arranged, in combination with feed-rol1er pairs 4" r and s 8 moving simultaneously, and with the fric-r tion-whe'els o and n, of which the latter at 7 each revolution actuates the former only for a short distance, working together and constructed substantially as shown and described, and for the purpose set forth.

This specification signed by me this 5th day of November,,1889.

GUSTAV A. ONCKEN.

Witnesses:

. HEINRICH HAYMANY,

'ADOLF HAYMANY. 

